Phonograph-reproducer.



2 SHEETS--SHEET l.

4sitges 15, and '15' The lever 1.7

withpivot points supported onv the -bar 18 UNITED `.STATES PATENT OFFICE. y

:romus'r Grimm,

or cHIoAco, Immers, AssroNon, BY MssNE ASSIGNMENTS, To'

CHENEY TALKING MACHINE CQMPANY. 0F CHICAGO, ILLINOIS, A COFPOBATION OF ILLINOIS.

IPHQOGRAPH-REBRODUCER.

Patented June 2c, 1917.

Application med October 6, 1913. Serial No. 798,746.

To all 'whom t may concern:

Bc it known that l, Fonns'r GlinNnv, :t citizen of the United States, residing at Chicgo, in the county of Cook-and Stute ot VIllinois, have invented certain new and. usen Phonogrn ph Reproful Improvements in following 1s a speciducers, of which the fication. 1

The principal object of my invcntion'is to provide n new find improved device tor reproducing sound from a. record. Another object of my invention is to provide a pho nograph reproducer with two dicphrcgms working' oppositcly to one another so as to give an increused intensity'in the reproduction of the sound from it record. Another object of my invention is to provide mechenism -for transmitting the vibrations of .n reproducer stylus to two diephrcgins to vi brzttcthe latter in opposition to one another. All these objects and others will he explninediand made; clear in thc'ollowing specification and claims, teken with the nccompnnying drawings in which I have 1llustinted two specific embodiments of my vcntionyit will he understood that them vention `is defined in the appended claims. I now proceed to describe he two specific embodiments, which asl have stated, are shown in the drawings.

Figure l. is an elevation.

2 is o. vgrtical section on the ,line 2 of Fig. 1 looking in the direction of the arrows.

Fig. 3 is zt top plan View.

Fig. Llis an elevation with the lowery part in section of the second form of my device.

F ig. 5 .is a. vertical section token on the line 5, 5 of Fig. 4c looking inthe direction of the arrows.

. Figs. 6, 7 andl 8 are perspective views o1' vfr'ragmentztry details.

Referring to the emoodiment of my .invention depicted in Figs. 1, 9. and 3, the ces ing 1 1-carriestwo diaphragins 13 Mid 13' with the respective cha hers 12 and 12 behind them both opening through the 'pesinto the single central Vchamloer 14 *which lends through the conduit 16 tothe sound amplifying horn notshown in thedrewings- Y has un intermediate nlcruni and opposite thcieto,'the point'carried by .the han' lheing made adjustable. At itslower end lever 17 has a` sleeve 19 carrying `the needle 20 adapted to be secured therein Also at its lower end laterally extending arm i by` the set screw 21. the lever17 has '.1

at the extremity of which is a pin and socket connection l25 to the lever 23 fulcrumed at 24.

The upper end ot the level* 23 is connectedat 26 to the center of the i diaphragm 13. v

' At its upper end the lever 177 has an oit set nrm 22 (opposite to 22) which conF nects thrfmgh 2i pin and socket joint 2li with the lever 23 fulcrnmcd at 24 and e011-, neeted et 26 with the diaphragm 13'.

lt will be seen that as the stylus 20 is vihiated the record, the lever 417 will he oscill-.itedebout its intermediate fulcruni4 und this movement will he transmitted .in` opposite directions through theutwo levers 23 and 23 tothe diaphragms '13 and`13. Thus the'two diaplirngms l'ond 13 w'ill move awny ,from one another in unison and towdrd one another in unison so that they will act togetherto` produce condensations and -rnrefnctions ofthe air within the chambers 12 and necting chamber 14.

Thus it will he Iseen that mitted from the vibrations of the stylus 20 will he augmented, reinforced., or intensified.

Referring now to the embodiment of my ,invention shown in'lhigs. 4: to 3, inclusive, this has e shell or casing 11 with the dlaphragms 13 mounted therein` similar to the form shown in Figs. 1, 2 and 3. While the vibration trensmittingmechanism` is' different in structure, its' effect is the seme. On each side there is e lever .30 with its vupper end 3l attached to the respective `diaphragm 13. Each lever 30 is pivotcd intermediately at 32 and its other end .consists of e point 33, the two points 33 on the-two levers 30 being directed toward each other, asjshown in Fig. The yoke 34 depends from the casing 11 and above this yoke 34 are two downwardly directed pivot points 35, which engage corresponding sockets 37 in the short lever 36 shown in perspective in Fig. 8. Underneath the lever 36 is a collar 41 which Acarries an obliquely directthe sound trans- 12 and. the intermediate conlcushion 38 of rubber, beneath which is a. metnlgplate 39 held .105

l. `edvstylus 42 secured by thc -set Iscrew sof andj. I claim:

1. -Inf "d freproducer, two parallel d1aph'rag tthffadjacent chambers between. the nec'ted to af common sound The othcr'end of the lever 36 has V-section grooves 44 on its sides which engage respectively with the points 33 that terminate the 'levers 30.

In the particular embodiment o f my invention shown in Figs. fito 8, l have shown the stylus 42 inclined to the vsurface 'of thc record 45; it being assumed in this instance, that the record is one embodying acon'ibined hill and dale cut `and a zig-zag cut.v

It will also' be seen that in the en'ibodimcnt of Figs. l to 8', thedever 3G is held in engagement with the pivot points bymeans of pressure transmitted through the cushion 38, The degree ot' this pressure is adjustable by means of the screws 40. This feature is not claimed in this application.

lt will be s'een that a vibration of the point of the stylus 42 results in an up and down oscillation of the end of the lever 3u carrying the grooves 44.. This up and down vibration is transmitted to the points 33, and thereby through the levers 30 opposite vibrations are imparted to the diaphragmey 13., -The effect is the same as for the form jtion illustrated' in Figs. 1, 2-

tween f them stylus vto the daphragrns to make the latter vibrate oud j ely. v Y

' 2 ln Q reproducer, two parallel l diaphra-gi Y tions from the stylus to said levers to vibrate the diaphragms opposite/ly,

3. In a sound rcproducer, two parallel diaphragme, a styhis below the same, a lever carrying thesaid stylus, two additional levers pivdtally and directly connected to the first mentioned lever and also connected respectively to the two diaphragms, and a common. sound outlet leading from ,both of said diaphragme.

' 4. ln a sound reproducer, two parallel diaphragme, two pivotally mounted levers arranged oijipositely adjacent the outer sides of said diaphragme, an actuating lever having a pin and socket connection with each of said levers, and a stylus mounted onsaid actuating lever.

5. In a sound reproducer, two parallel diaphragms, two pivotcd levers normally disposed in parallel planes and each connected to one of said diaphragims', an actu*- ating lever carrying a stylus and directly connected to each of said levers whereby said diaphragms are moved toward or away from each other simultaneously, and a common sound outlet leading from both ot said diaphragms.

6. In a sound rfa-producer, two parallel diapli-ragms, levers connected to said diaphragms on their outer sides, an actuating lever having oppositely directed angular-ly disposed ends, cach pivotally connected to one of said irst named levers, and a stylus carried by' said actuating lever.

In testimony whereof, I have subscribedl my name.

FOREST CHENEY.

lVitnesses Groll. WILKINSON, EDYTHE M. ANDERSON. 

